Dildos and dongs are made from a variety of materials, including silicone, PVC, rubber, glass, and stainless steel. Silicone is considered the best material for its softness, flexibility, and body-safe properties—it's hypoallergenic, non-porous, and easy to clean. Glass and stainless steel dildos offer a firmer, smoother feel and can be heated or cooled for temperature play. PVC and rubber options are more affordable but can be porous, so it's important to check that they are phthalate-free and use condoms with them if needed. Silicone is typically recommended for its safety, durability, and comfort.