Burton Expedition Crew – this is my fourth Burton Expedition garment from PRFO Sports. I am a bigger physique (5'10", 210lbs) so was concerned that this medium would be too tight and restrictive, but this Crew-style long sleeve was bang-on perfect for a performance base-layer style fit, as the fabric has great elasticity. My other Burton Expedition pieces are two 1/4 zip long sleeves (in L, excellent fit) and the base layer pant, in XL, built for comfort that last one. I actually prefer these Expedition pieces for hanging out apres snowshoe etc., rather than sweat-pouring athletic pursuits. These are my comfort and warmth lounging pieces, and indeed they are comfortable and warm! Burton garments are top-rank in quality. They make excellent products.