Fit: "As you might have suspected, this M&S number was a true star. With medium control, and great stretch, this slip dress smooths, without being difficult to get into, and it's breathable too. It's not going to make you drop a dress size, but if you want to have a smoother silhouette under an outfit, this does the job well. The slim shoulder straps will also work under a lot of sleeveless dress too for added versatility." While we wish there was a snap closure for more efficient bathroom breaks, we’re happy to look past that given the fairly flexible material, which offers plenty of mobility when taking this on and off despite the light-level compression. Fit: "Designed for everyday wear I was pleasantly surprised that these shorts smoothed my shape rather than skimmed it. Already a fan of the brand's trousers and leggings, SPANX has really developed their product offering and continued to strive to create new pieces to enhance a women's shape. Smoothing out waist to thighs, a no-slip strip at the waist stops these shorts from rolling down, while some clever ruching at the rear discreetly lifts bums. The high waistband creates a shapely middle too, great for those looking to create an hourglass silhouette." What We Love: This bodysuit (and every bodysuit Girlfriend Collective has to offer) comes with a built-in support band if you don’t want to wear a bra.

We did find it a little tight around the thigh, however. On our bigger bottoms, the leg openings dug ever-so-slightly into the flesh which only started to become uncomfortable after a few hours of wear. that offers a range of clothing made to break boundaries, to elegant evening and everyday wear from Yours London You should neither size up nor down when it comes to shapewear. These garments are already built with compression in mind, and sizing down will only feel too tight and uncomfortable on you. Raymond reminds us that it's important not to compromise comfort for compression.

Confirm your age

It’s just as important to pay attention to what you don’t see: The bodysuit’s bottom. A snap or hook-and-eye closure makes using the restroom easy (that way, you don’t have to take the whole bodysuit off). If you’re trying to avoid underwear lines, choose a thong bodysuit. There are bodysuits with full-coverage bottoms, though, if you find those more comfortable.

What We Don’t Love: Though the bodice is structured to support your chest, the cups are a tad too small for bigger busts.Quality of materials: "With a firm compression, the fabric is supportive and firm but still comfortable. This is certainly a piece for those that want a full smoothing effect." Do you want support around your middle? If its a more contoured waistline you're after, look for pieces that come up high, past your waist line. This could be shaping shorts or briefs, but it also could take the form of a body that will support the whole of your middle and help to create an hourglass silhouette. Closure: Some bodysuits are pull-on, which means you step into them as you would a one-piece bathing suit. They’re simple to put on but a little inconvenient to take off, especially when you need to use the restroom, Constantine explains. Other styles have a snap bottom that can be undone with ease, and snap bottom styles can be made adjustable with multiple rows of snaps available to shorten or lengthen the fit. Part of Old Navy’s body-positive collection, this piece features a wide size range (up to 4XL) and beautifully hugs curves without feeling restrictive. Overall, we love this bodysuit for its quality, comfort, and impossibly flattering silhouette. It is, however, at risk of shrinking should you throw it in the dryer. Make sure to hang-dry instead to maintain the original shape. What We Don’t love: The gusset is sewn closed, so you’ll have to completely undress if you need to use the bathroom.