Heavy-duty winter tents can cost a fortune, but luckily there is the Sea to Summit Reactor Extreme Thermolite Liner. This highly-rated winter adventure staple is the perfect way to upgrade a regular tent to withstand the tough winter conditions. The small and lightweight Thermolite liner adds up to 25F (14C) and even fits into a tiny and convenient carrying bag.
Contributor: Sam Mazilech from Gunivore