I bought 2 of these sackpacks for my daughters to take to day camp this summer.  We have another sack pack that does not have the zipper compartment so I bought these in order to place their spending money in the little compartment and their sunscreen/goggles in the larger zip compartment while their large pool towels, flip flops, swimsuits, rash guard and lunch fit in the main compartment.  Plenty of room and easy access to the compartments.  It dries quick after they put their wet towel/suits in the bag.  They have been using them daily for 6 weeks and it has worked well.  I highly recommend this for day camp bags or for sports or swim lessons.