About this item Compatibility Compatible with Studio Buds, Studio Buds + 2023 Release, Solo Buds 2024 Release, and Fit Pro. Slow Rebound Sponge Memory foam is a polyurethane foam with slow rebound sponge that takes 1-5 minutes to fully return to shape after being pressed. Rest assured, it will regain its form. Long Lasting Comfort High-quality soft foam provides 24 hours of comfort, alleviating ear discomfort caused by silicone tips. Enjoy extended wear without pain, perfect for running, cycling, workouts, and more. More Size Options, Better Fit Small, Medium, and Large - 3 different sizes to comfortably fit your ear shape. Fits in the charging case without removing the ear tips. Ear tips only, earphone and charging case NOT included. Storage Box Comes with a storage box for 6 pairs of ear tips (S/M/L, 2 pairs per size). Ear tips only, earphone and charging case NOT included. Dimensions: 2.3 x 1.8 x 0.5 inches.