Sleeper Loop is designed to be your travel and sleep companion. Its tiny housing is made of silicone unibody and designed for maximum comfort and universal fitment. It's specifically tuned for transparency and clarity of audio even in low volume. Details are clear and never fatiguing, bass is controlled but fully present. Sleeper Loop has one-size ear tips to fit all ear types and is designed to stay in the ears comfortably even for side-sleeping. A full-range micro driver is designed to deliver a neutral and comfortable sound signature perfect for sleep and relaxation - no sudden peaks and spikes. Only a pleasant surprise.