These snorkel swim fins are designed for adults and come in a range of sizes to suit common shoe measurements. Materials listed across variants include silicone, PC and PVC, offering a mix of flexibility and structural support in the blade and foot pocket. An open, adjustable open-heel design makes it easier to get a secure fit and to use the fins with neoprene booties if desired. Sizes include S/M (Men 4.5-8.5 / Women 5.5-9.5), L/XL (Men 9-13 / Women 10-14), and a US Youth 1-4 | EU 32/36 option for smaller feet. The fins are presented in multiple colors—BLACK, BLUE, PINK, BLUE-WHITE, GREY, GREEN and PINK-WHITE—so you can choose a style that suits your gear. These swim flippers are intended for snorkeling and swimming use, offering a straightforward option for recreational water activities. The product information identifies the age group as adults, with size options covering a range of adult and youth fits.