long underwear# What is a base layer? All your questions answered What is a base layer, and why do you need one for hiking? We answer all your questions about this important piece of clothing in your hiking wardrobe Advnture NewsletterAll the latest inspiration, tips and guides to help you plan your next Advnture!Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors LATEST ARTICLES1Iconic boulder in UK’s Peak District climbed for only the second time - 12 years after the first ascent2Spike in "bum sliding" on popular mountain hike leaves more than just skid marks, as 2 rescued in 2 days3Xero Shoes Mesa Trail is a "barefoot beauty" for natural runners, and it's a massive 50% off right now4I’m an avid camper – here’s how I update my camping kit for winter5Hikers criticised for poor parking, which slowed rescue teams in the Peak District after a man was injured