Under Armour has the Under Armour Men's Sportstyle Duffle (Outpost Green) for $47 - 25% off with coupon WFH25 = $35 with free shipping. Features two-way carry w/ shoulder straps and removable cross-body strap, measures 10.82" x 10.82" x 21.65".
Amazon has the OutdoorMaster Boot Bag (Khaki or Black) for $19 - 5% off coupon (Clip extra savings coupon applied at checkout) = $18.05 with free shipping on $25 or with Prime. List price: $20. It fits any size or snowboarbd boots, compact and funtional, watersproof, thick and sturdy.
Has excellent Amazon Reviews.