What is the difference between waist tights with and without a chamois?

Waist tights with an integrated chamois are standalone garments—you wear them directly against your skin like padded shorts, with no additional padded layer needed. Waist tights without a chamois (sometimes called over-tights) are designed to be worn over separate padded shorts. Over-tights offer the flexibility to choose your preferred chamois and are useful if you already own comfortable padded shorts. However, the two-layer system can feel bulkier and may cause the inner shorts to shift. For most riders, integrated chamois tights are simpler and more comfortable.