FREE SHIPPING FOR ALL ORDERS OF $999
FREE SHIPPING FOR ALL ORDERS OF $999
Select category
  • Select category
  • Ammo
    • High-Capacity Ammo Crates
    • Match-Grade Ammunition
    • Premium Hunting Ammo
    • Rare or Collectible Ammo
    • Tactical Ammo
  • Bows
    • Compound Bow Packages
    • Hunting Compound Bows
    • Longbows
  • Hunting & Fishing Gear
    • High-End Hunting Riflescopes
    • High-Quality Fishing Reels
    • Hunting Rangefinders with Ballistic Calculators
    • Thermal Imaging Scopes for Hunting
  • Marathon Watch
  • Optics
    • High-End Red Dot & Holographic Sights
    • High-End Rifle Scopes
    • Night Vision & Thermal Optics
    • Premium Binoculars
    • Spotting Scopes
  • Outdoor Gear
    • High-End Camping Tents
    • High-Quality Backpacks
    • Premium Sleeping Bags
    • Survival Kits
    • Tactical Flashlights
  • Tactical Gear
    • Body Armor & Plate Carriers
    • High-End Tactical Backpacks
    • Premium Holsters
    • Tactical Lights & Lasers
    • Tactical Night Vision Goggles
Login / Register
1 item $569.00
Menu
1 item $569.00
  • HOME
  • ABOUT US
  • Optics
    • High-End Red Dot & Holographic Sights
    • High-End Rifle Scopes
    • Night Vision & Thermal Optics
    • Premium Binoculars
    • Spotting Scopes
  • Outdoor Gear
    • High-End Camping Tents
    • High-Quality Backpacks
    • Premium Sleeping Bags
    • Survival Kits
    • Tactical Flashlights
  • Ammo
    • High-Capacity Ammo Crates
    • Match-Grade Ammunition
    • Premium Hunting Ammo
    • Rare or Collectible Ammo
    • Tactical Ammo
  • Hunting & Fishing Gear
    • High-End Hunting Riflescopes
    • High-Quality Fishing Reels
    • Hunting Rangefinders with Ballistic Calculators
    • Thermal Imaging Scopes for Hunting
  • Tactical Gear
    • Body Armor & Plate Carriers
    • High-End Tactical Backpacks
    • Premium Holsters
    • Tactical Lights & Lasers
    • Tactical Night Vision Goggles
  • Marathon Watch
  • Bows
    • Compound Bow Packages
    • Hunting Compound Bows
    • Longbows
  • Contact Us
  • Track Order
“KUIU Storm Star 2P” has been added to your cart. View cart
-14%
Click to enlarge
Home Outdoor Gear Premium Sleeping Bags Sea to Summit Spark SpIII
AGM Global Vision Rattler TS50-384
AGM Global Vision Rattler TS50-384 $2,099.00
Back to products
Sellier & Bellot Exergy Blue .30-06 180gr Lead-Free
Sellier & Bellot Exergy Blue .30-06 180gr Lead-Free $48.00

Sea to Summit Spark SpIII

Rated 4.60 out of 5 based on 5 customer ratings
(6 customer reviews)

$499.00 Original price was: $499.00.$429.00Current price is: $429.00.

Sea to Summit Spark SpIII: Ultralight warmth and packability redefined. This down sleeping bag delivers exceptional performance for weight-conscious adventurers, boasting premium 850+ fill power down, a lightweight 10D nylon shell, and a tapered mummy shape for efficient thermal regulation. Experience unparalleled warmth-to-weight ratio and minimal pack size, perfect for backpacking, thru-hiking, and alpine pursuits.

Categories: Outdoor Gear, Premium Sleeping Bags Tags: backpacking sleeping bag, down sleeping bag, Sea to Summit Spark, ultralight sleeping bag
Share:
  • Description
  • Reviews (6)
  • Shipping & Delivery
Description

Sea to Summit Spark SpIII Sleeping Bag

The Spark Series sleeping bags are designed to be as lightweight and packable as possible while still providing a comfortable and reliable sleep. The Spark SpIII is an excellent option for adventurers who are conscious of weight and pack size but still require a versatile bag for a range of conditions.

Features of Sea to Summit Spark SpIII:

  • Ultralight and compressible for backpacking and adventure travel
  • 850+ Loft Premium Goose ULTRA-DRY Down for superior insulation
  • Lightweight 10D Nylon shell and 7D lining fabrics to minimise weight and bulk
  • Mummy shape for thermal efficiency
  • Side block baffle construction ensures down doesn’t shift
  • Full length side zip with two zip sliders allows the Spark to be used as a quilt and provides easy access
  • Includes lightweight Ultra-Sil compression bag and storage cell

Package Contents:

  • Sea to Summit Spark SpIII
  • Ultra-Sil compression bag
  • Storage cell

Specifications for Sea to Summit Spark SpIII:

  • Gender: Unisex
  • Insulation: Down
  • Temperature Rating: 25°F / -4°C
  • Shape: Mummy
Reviews (6)

6 reviews for Sea to Summit Spark SpIII

  1. Ethan_ShadowFox – July 7, 2024

    Rated 5 out of 5

    I’m telling you, the Spark SpIII is worth every penny. It’s like the golden standard of sleeping bags for backpackers. Super lightweight, super warm. Feels like sleeping on a cozy cloud.

  2. Bella_MagicRiver – October 8, 2024

    Rated 4 out of 5

    The Sea to Summit Spark SpIII is a must-have for backpackers who prioritize weight and warmth. It’s incredibly lightweight, yet kept me toasty on chilly nights.

  3. Ryan_WildRider23 – November 7, 2024

    Rated 4 out of 5

    The Spark SpIII is a game-changer for backpackers like me. It’s so lightweight but managed to keep me warm and comfy on my last camping trip. Love this one!

  4. Leo_Nightfox – November 15, 2024

    Rated 5 out of 5

    Spark SpIII was definitely a worthwhile buy! It’s like magic, keeping you warm and cozy in the wilderness without weighing you down like a brick.

  5. Nova_Strider – December 9, 2024

    Rated 4 out of 5

    The Spark SpIII is awesome. Ultralight backpacking is all I do now, and this sleeping bag honestly levels it up so much.

  6. Grace_Starstrike – December 15, 2024

    Rated 5 out of 5

    I’ve been a long-time fan of Sea to Summit gear, and the Spark SpIII is no exception. It’s super lightweight but still kept me warm as could be on a recent backpacking trip.

Add a review Cancel reply

Your email address will not be published. Required fields are marked *

Shipping & Delivery

Related products

Big Agnes Blacktail Hotel 2

Outdoor Gear, High-End Camping Tents
$209.00
Rated 4.00 out of 5
The Big Agnes Blacktail Hotel 2: Your backpacking basecamp redefined. Boasting unmatched livability thanks to its massive front vestibule (your "hotel lobby"), this tent offers ample storage for gear and a comfortable refuge from the elements. Durable, lightweight, and easy to set up, the Blacktail Hotel 2 allows you to experience the backcountry without sacrificing convenience or space.
Add to cart
Quick view
-34%

Big Agnes Tiger Wall UL3

Outdoor Gear, High-End Camping Tents
$499.00 Original price was: $499.00.$329.00Current price is: $329.00.
Rated 4.80 out of 5
Big Agnes Tiger Wall UL3: Ultralight for three, this award-winning tent balances spaciousness and packability with its minimalist design. Perfect for fast-paced adventures where weight is critical, it offers exceptional weather protection and durability without sacrificing comfort. Its semi-freestanding design simplifies setup, making it the ideal choice for backpackers seeking the ultimate in lightweight performance.
Add to cart
Quick view

Hilleberg Jannu

Outdoor Gear, High-End Camping Tents
$1,099.00
Rated 5.00 out of 5
Hilleberg Jannu: Uncompromising alpine shelter. This freestanding, all-season tent delivers exceptional strength and stability in a remarkably lightweight package. Perfect for exposed locations and demanding conditions, its robust Kerlon 1200 fabric and interconnected pole system ensure resilience against fierce weather. Ideal for solo adventurers or minimalist pairs seeking a reliable and adaptable basecamp.
Add to cart
Quick view

Mountain Hardwear Trango 2

Outdoor Gear, High-End Camping Tents
$999.00
Rated 4.33 out of 5
The Mountain Hardwear Trango 2 is a fortress for two. Legendary weather protection, bombproof durability, and a surprisingly comfortable interior make it the ultimate basecamp or high-altitude shelter. Its Atlas frame provides exceptional stability in fierce winds, while ample storage keeps you organized on extended expeditions. Simply put, the Trango 2 is built to withstand the harshest conditions and keep you safe and secure.
Add to cart
Quick view
-20%

MSR Elixir 2

Outdoor Gear, High-End Camping Tents
$199.00 Original price was: $199.00.$159.00Current price is: $159.00.
Rated 4.50 out of 5
MSR Elixir 2: Your go-to backpacking tent. Spacious livability, easy setup, and reliable weather protection make this a trusted companion for solo adventurers and couples. Durable materials and a unique pole geometry create a comfortable shelter without breaking the bank or your back. Simplicity meets performance, delivering exceptional value for any outdoor enthusiast.
Add to cart
Quick view

MSR Freelite 2

Outdoor Gear, High-End Camping Tents
$429.00
Rated 4.36 out of 5
Ultralight, freestanding, and designed for serious backpackers: The MSR Freelite 2 offers exceptional liveability for two, without sacrificing pack weight. Experience a spacious interior, excellent ventilation, and MSR's legendary weather protection, all in an incredibly lightweight package. Dominate the trail with comfort and confidence.
Add to cart
Quick view

Nemo Hornet Elite

Outdoor Gear, High-End Camping Tents
$499.00
Rated 4.17 out of 5
Nemo Hornet Elite: Ultralight backpacking redefined. This tent boasts exceptional space-to-weight due to its innovative architecture and premium materials. Experience unmatched livability and weather protection in a featherlight package, making it the ideal shelter for serious adventurers seeking peak performance.
Add to cart
Quick view

Rab Latok Summit

Outdoor Gear, High-End Camping Tents
$929.00
Rated 4.50 out of 5
Rab Latok Summit: Conquer complexity. This WordPress theme offers unparalleled flexibility with its modular design, empowering you to build unique websites effortlessly. Its intuitive interface and comprehensive customization options ensure a professional, responsive, and visually stunning online presence, without coding headaches. Stand out from the crowd and achieve your web development peak.
Add to cart
Quick view

    We offer top-tier optics and tactical gear, delivering precision and quality you can trust. Elevate your experience with the best in the industry.

    Tiktok Facebook

    Customer Service

    • Shipping Policy
    • Privacy Policy
    • Terms and Conditions
    • Refund Policy

    Information

    • How to Order
    • Contact Us
    • About us

    Contact Info

    Email: service@optixmerchant.com

    Tel: +1(202)813-0162

    Address: 2519 TAFT DR, LUMMI ISLAND, WA, 98262-8632, UNITED STATES

    Hours of Operation:

    Monday-Saturday
    Time(9am -11:30pm)

    Copyright © 2025 Optix Merchant

    • Menu
    • Categories
    • HOME
    • ABOUT US
    • Optics
      • High-End Red Dot & Holographic Sights
      • High-End Rifle Scopes
      • Night Vision & Thermal Optics
      • Premium Binoculars
      • Spotting Scopes
    • Outdoor Gear
      • High-End Camping Tents
      • High-Quality Backpacks
      • Premium Sleeping Bags
      • Survival Kits
      • Tactical Flashlights
    • Ammo
      • High-Capacity Ammo Crates
      • Match-Grade Ammunition
      • Premium Hunting Ammo
      • Rare or Collectible Ammo
      • Tactical Ammo
    • Hunting & Fishing Gear
      • High-End Hunting Riflescopes
      • High-Quality Fishing Reels
      • Hunting Rangefinders with Ballistic Calculators
      • Thermal Imaging Scopes for Hunting
    • Tactical Gear
      • Body Armor & Plate Carriers
      • High-End Tactical Backpacks
      • Premium Holsters
      • Tactical Lights & Lasers
      • Tactical Night Vision Goggles
    • Marathon Watch
    • Bows
      • Compound Bow Packages
      • Hunting Compound Bows
      • Longbows
    • Contact Us
    • Home
    • Login / Register
    Shopping cart
    Close
    Sign in
    Close

    Lost your password?

    No account yet?

    Create an Account
    1 item Cart
    My account