I use these for fins, masks, snorkels, etc. Great size for larger fins IE  Mares Avanti Quatro Power... May not be big enough for full size free dive though. Durable with large enough mesh to let out all the sand and evap moisture, but small enough to keep the little stuff from escaping. Two zipper pulls per zipper is a nice feature and the zippers themselves work well. For shore dives these are perfect to leave behind because "people" that look for valuables left on the beach can easily see your bag is empty when you have taken your gear into the water. The red is great for visibility while dark enough that it does not need washing every use. This bag easily holds three full sets of adult gear. The last picture shows one of my bags with 3 full sets of snorkel gear including two sets of Mares Avanti Quatro Power fins and one set of AquaLung Express, three snorkels and masks

I will also mention that the inside seams are wrapped is nylon material. Very sturdy.

I ordered two and they have out performed what I would have expected for this price.