A pack comprising, in one aspect, a first enclosure and a pair of sleeves. The open end of each sleeve being connected to one respective slit of a pair of slits defined on the exterior surface of the first enclosure such that the pair of sleeves is disposed therein a first interior cavity of the first enclosure to form pockets adapted to receive a user's hands. The pack may also comprise a second enclosure and a shoulder strap connected to portions of the exterior surface of the respective first and second enclosures.