The slim offers all the technology of the fat, but fits in lower volume shoes. The double-arc heel design cups the foot and reduces pressure on the plantar fascia. The low friction top cover is long-wearing and easy to clean. Super-lightweight with just enough cushioning for comfort, it's perfect for obstacle course racing (ocr), keeping you stable on even the toughest obstacles and terrain. Ideal for: running, cleated sport shoes, skating, cycling, dress or any low volume shoe. Available in three different arch shapes: high/med/low thickness: 2mm