Insoles that can be removed for washing or replacement and generally provide more cushioned support.
About Wellies:
Wellies, also known as Wellingtons, are slip on boots often made of waterproof synthetic materials or water resistant leather and used for walking on muddy or wet surfaces and to protect the wearer in rainy conditions.
Wellies often feature low heels with traction pattern rubber soles and uppers reaching just below the knee.