Shapewear under jeans is a different problem than shapewear under dresses. Jeans are rigid. They do not stretch or drape. Every layer you put between your body and the denim has to sit flat and stay flat because there is no give in the fabric above it to absorb any bunching or shifting.The Main Problem With Shapewear Under JeansMost shapewear is designed for wear under dresses and skirts where the outer fabric has stretch and movement. Under jeans, any shapewear that bunches at the waist, thigh, or knee creates a visible lump in the denim. You can see it from the outside. The jeans become misshapen wherever the shapewear has shifted.What Works: Smooth, Fitted BodysuitsA bodysuit that tucks into the jeans at the waist is the cleanest solution. The bodysuit sits smoothly against your torso, tucks at the waistband of the jeans, and there is no lower edge to bunch anywhere. The Brief Bodysuit or the Wide Strap Bodysuit work well for this because the bottom of the bodysuit snaps at the crotch and stays in place rather than riding up.What Does Not Work: High-Waisted Shorts Under JeansHigh-waisted shapewear shorts under jeans create a double waistband situation that is both visible and uncomfortable. Two waistbands at the same point on your body means double the bulk, double the pressure, and almost certainly a visible line through the denim at the waist. Skip this combination entirely.The Tuck TestBefore committing to any shapewear and jeans combination, do a tuck test. Put on the shapewear, tuck or fasten it into the jeans, then sit down and stand up several times. Check in a mirror after. If anything has shifted, bunched, or created a visible line in the denim, it is not the right combination for this outfit.Find your fit using the Shapies size guide.