Scrunch Bum Shorts

Scrunch Bum Shorts for Gym, Training & Everyday Movement

At Avvini Athletica, our scrunch bum shorts combine a flattering contour fit with supportive high-waisted designs and flexible stretch fabrics made to move with you. From strength training and HIIT to running and everyday activewear, choose from shorter gym styles, ribbed sculpting fits and longer scrunch bum bike shorts designed for different ways of moving.

Whether you prefer the adjustable fit of Luna, the subtle contour of Vital or the extra coverage and pockets of Luna Bike, find the pair that fits your training style.

Find Your Avvini Scrunch Shorts Fit

Not all scrunch bum shorts fit or feel the same. Compare our Luna, Vital and Luna Bike ranges to find the construction, waistband and performance features that suit how you like to train and move.

Range	Fabric & Construction	Waistband & Fit	Standout Features
Luna	Honeycomb texture, 88% nylon / 12% spandex	High-waisted compressive waistband with adjustable side ties	Four-way stretch, moisture-wicking, quick-dry construction and adjustable ruching for a shorter silhouette
Vital	Ribbed texture, 74% nylon / 26% spandex	High-compression V-shaped waistband	Subtle half scrunch, breathable four-way stretch, moisture-wicking, quick-dry and squat-proof coverage
Luna Bike	Longer bike-short construction, 88% nylon / 12% spandex	High-waisted compressive waistband	Scrunch bum design, four-way stretch, moisture-wicking, quick-dry performance and dual phone pockets

Use the individual product page and size guide to confirm the exact fit and features of the colour and style you're considering.

Signature Scrunch Bum Design

Our scrunch bum shorts use gathered construction through the centre-back seam to follow and define the natural shape of your glutes. The result is a sculpting silhouette designed to complement your shape while still giving you the freedom to move through your workout.

Not every Avvini scrunch is the same. Luna offers a more defined scrunch with adjustable side ties, while Vital uses a subtler half-scrunch construction for a softer contour. Luna Bike combines the scrunch bum look with a longer bike-short silhouette when you want more coverage.

Made for Gym Sessions and Everyday Movement

Your training changes from day to day, and your shorts should be able to move with it.

Our scrunch bum gym shorts combine flexible stretch fabrics with supportive high-waisted fits for strength training, HIIT, cardio and everyday movement. Four-way stretch gives you freedom through squats, lunges and dynamic exercises, while moisture-wicking and quick-dry properties help manage sweat as your training intensity rises.

Prefer extra leg coverage? Luna Scrunch Bum Bike Shorts give you a longer silhouette plus dual side pockets for your phone. For a shorter adjustable fit, choose Luna. If you prefer ribbed fabric, a V-shaped high-compression waistband and squat-proof coverage, explore Vital.

Stretch, Sweat & Workout-Ready Performance

Comfort matters when you're lifting, running or working through a high-intensity session. Avvini's scrunch shorts use stretch-focused constructions designed to move with your body rather than fight against it.

Across Luna and Vital, you'll find features including four-way stretch, moisture-wicking and quick-dry performance, with construction varying by range. Vital adds breathable ribbed fabric and squat-proof coverage, while Luna combines its honeycomb texture with a supportive compressive waistband.

This range-specific approach lets you choose your shorts based on the performance features that matter most to you rather than assuming every style fits and feels exactly the same.

Shop Scrunch Bum Shorts at Avvini Athletica

Find the scrunch bum shorts that suit the way you train. Choose Luna for adjustable ruching and a shorter silhouette, Vital for a ribbed sculpting fit with squat-proof coverage, or Luna Bike when you want longer coverage and practical phone pockets.

Order before 2PM AEST for same-day dispatch, with Free Express Shipping on Australian orders over $120.

Frequently Asked Questions

Scrunch bum shorts feature gathered or ruched construction through the centre-back seam to create greater definition around the glutes. The amount of gathering can vary between designs, creating anything from a subtle contour to a more defined scrunch effect.

Choose Luna for an adjustable shorter silhouette with side ties, Vital for a ribbed fit with a V-shaped waistband and subtler half scrunch, or Luna Bike when you prefer longer coverage and practical side pockets.

Yes. Avvini scrunch bum shorts use flexible four-way stretch fabrics designed to move through exercises such as squats, lunges and lower-body training. If squat-proof coverage is a priority, Vital is the Avvini range where this feature is specifically stated.

Luna Bike Shorts are designed with a longer bike-short silhouette, making them the Avvini option to consider when you prefer more coverage through the thighs while keeping the high-waisted scrunch bum look.

Luna Scrunch Bum Bike Shorts feature two side pockets designed to fit a standard smartphone. Pocket construction varies between styles, so check the individual product details if pockets are an important feature for your training.

Scrunch bum shorts should feel secure and supportive without restricting your movement. The waistband should sit comfortably while the fabric allows you to squat, bend and move freely without excessive tension through the scrunch seam.

Movement can vary depending on the length and construction of the shorts, your body proportions and the type of exercise you're doing. Choosing the correct size is important, while a longer bike-short silhouette may suit you better if you prefer greater thigh coverage during training.

Machine wash your shorts cold with similar colours and use a wash bag. Avoid bleach and tumble drying, lay them flat to dry away from direct sunlight, and follow the care instructions provided with the individual garment.