【SUITABLE FOR DIY】:The material of these drawstring backpack is 100% polyester and accepts the sublimation. It's easy to use a household iron to make it.Apply with a heat transfer machine or household irons(Do not use steam iron). Temperature Control: 150°C to 250°C, or choose the temperature for Cotton Materials directly. Ironing Time： Around 15 to 20 seconds. You can print any logo or pattern on it for company promotions, or sports team.This item is not intended for use by 12 and under. 【LARGE SIZE AND LIGHTWEIGHT】: The size of these black string bags is very high 13.3 "× 16.5", which is very suitable for promotional gifts, company activities or external activities. Enough to storel daily supplies, such as cups, parasols, sunglasses, mobile phones, etc. The material is polyester, which is very light. Needless to worry that the string backpack will be heavy, and it is convenient to carry. 【MACHINE WASHABLE AND DURABLE】: Every sports bag must be washable and reusable. This set of drawstring backpack can be reused ,which has a lightweight polyester design that's incredibly easy to clean—Toss these grocery bags right into the washer and save your time! And these drawstring bags bulk are durable.Both corners of the bag have triangular reinforcement and metal hole eyes. It is enough to endure daily wear. Recommend Mild Detergent and Hang to Dry! 【VARIOUS COLORS】: Our string backpack have a variety of colors, which are suitable for various occasions such as travel, sports, gyms. Black classical colors are easy to match, so these sports bags are very suitable for sports bags or fitness bags. Different colors are suitable for different consumer groups. Regardless of adults or men and women can use these cinch bags drawstring to carry items, and the drawstring backpack bulk will simplify your life. 【MULTI-PURPOSE】: These drawstring bags very suitable for gym, travel, hiking, camping and other outdoor activities. It can also be used as a festive gift packaging, and it can also be used as a blessing bag and gift bag. They can be used as sports bags, wearing basketball, football and other sports products. 1.Our drawstring gym cinch bags are perfect for many parties, like camping , birthday , wedding , as s bags and goodie bags. Each set of these pack of drawstring bags have 20 solid color bags. Great for many different occasions. 2.These drawstring backpack sack can fit a surprising amount of items inside such as gloves, resistance bands and so on. Our personalized draw string back pack bags have bright colors which are ideal gifts for Thanksgiving, Christmas, New Year's Eve, birthday, etc. 3.These drawstring backpack bookpack bags are goodies, you can use our draw string back pack bags as gift bags for a team, you can print their names and numbers on these bags that they would be a huge hit! Our gym sack bag drawstring backpacks are also suitable for all men and women, so these string cinch bags are an ideal choice for gifts. 4.You can also stuff our cinch backpack bags with warm things like socks, food, water, etc. to give out to the homeless for them to reuse so that if other people gave them things or they found items, they could have something to carry while still having their hands free.5.This item is not intended for use by 12 and under.