Sea to Summit Tki Trek, Regular, Right Hand, Black/Orange The trek I - the lightest in the Series - is ideal for summer camping or warm-weather traveling. Two zippers turn the broad-cut bag into a comforter Ultra-dry down 650+ loft 85% down cluster premium duck down Full-length YKK side zipper and separate YKK foot-box zipper Broad, tapered-rectangular cut: extra room for more comfort Zipper draft tube with anti-snag, zippered internal pocket