WIRED updates 2026 sleeping bag guide with top picks for ultralight and comfort
From the Sea to Summit Spark 18 to the REI Siesta Hooded 20, the latest guide from WIRED identifies key models for various camping scenarios and budgets.
WIRED has released an updated guide for 2026, identifying top-performing sleeping bags across categories ranging from ultralight backpacking to car camping and cold-weather use. The publication reviews models from brands including Mountain Hardware, REI, Sea to Summit, Marmot and Zenbivy, offering specific recommendations based on warmth-to-weight ratios, comfort and price points.
The guide highlights the Mountain Hardware Bishop Pass 15 as the best option for warmth-to-weight ratio, noting its versatility for shoulder seasons and its ability to pack down small. For car camping, WIRED recommends the REI Siesta Hooded 20, citing its roomy rectangular cut, affordability and double-zipper system that allows it to function as a quilt. The Zenbivy Bed 25 is singled out for comfort, featuring a modular system with a soft top sheet and a quilt that can be configured in various ways depending on temperature needs.
For ultralight enthusiasts, the Sea to Summit Spark 18 is identified as the lightest bag in the guide at 1 pound 9.7 ounces, with a small pack size suitable for thru-hikers. The guide also addresses specific sleeping styles, recommending the Nemo Disco 15 for side sleepers due to its spoon-shaped design, and the Therm-a-Rest Questar for those seeking a roomier mummy bag with additional leg space.
The publication provides educational context on technical specifications, including the difference between down and synthetic insulation, ISO temperature rating standards and fabric denier. It notes that while down offers superior warmth for its weight, synthetic fill such as the Nemo Forte 20 retains warmth in wet conditions and is often a more budget-friendly option for summer use.
Previous iterations of the guide have tested gear since 2018, with the November 2024 update removing discontinued or sold-out items. The 2026 edition clarifies that temperature ratings are based on ISO standards, distinguishing between objective temperature ratings and subjective comfort ratings, while also addressing ethical considerations regarding down sourcing and the use of PFC-free durable water repellent coatings.
