- MATERIAL: The Cinch Sack Bags are made of high-quality 6 oz.100% cotton fabric. Reusable string drawstring bags are biodegradable and recyclable. - DESIGN: These gym sack drawstring backpacks are very lightweight, easy to carry and can be folded up when unnecessary. - MULTIPURPOSE: The drawstring backpacks are suitable for travel, gym, outdoors, school, work, hiking, cycling, running, yoga, dance, and so on. Ideal gift for birthday party favors, festivals, trade shows, giveaways, promotional events, and advertising your business with its large imprint area. - SIZE: 14"W x 18"H, Imprint Size: 11"W x 12"H(Listed as blank, printing is not included). The large imprint area is great for customization, arts & crafts, DIY, embroidery, decorating, screenprint, and so on. - Shop Eco-Friendly with our Biodegradable Drawstring Bag.