Listen to your favorite music with the Sony WF-SP900 while working out. Thanks to its waterproof design, it'll never suffer from water damage caused by sweat or rain. Do you plan on taking a shower or swim after working out? Even then, the earbuds are protected from water damage. The earbuds can last up to 30 minutes in water up to 2 meters, in both fresh and salt water. When you plan on taking a swim, simply put in the included swimming earbuds for a waterproof fit. The internal memory of 4GB lets you store about 920 songs. This way, you'll never be without music.