Some say the grass is always greener. Meaning that no matter which side of the fence you’re on, you’ll always want what’s on the other side.

That saying has real staying power. Why? Because it’s as true for hair as it is for grass.

Those with straight hair wish for curly hair. Cottage industries have risen to meet that demand, offering a litany of curling tools, shampoos and hairy gadgets that promise curly locks.

On the flip side, those with curly hair long for an efficient, safe-to-use tool to flatten out their waves. Luckily, one such tool exists to meet both your straightening and curling needs. Better yet — it’s on sale.

Enter the Dyson Corrale hair straightener, available on Amazon this week for $100 off. Designed to produce a range of styles, the Dyson Corrale will straighten, curl and engineer waves in your hair for a picture-perfect look. Plus, it does it all without a pesky cord.

Effective, easy-to-use and easy on the wallet, the Dyson Corrale hair straightener lets you create salon-quality hair styles right at home. For more haircare upgrades, check out Dyson’s Supersonic hair dryer, which we found to be a smart tool for men and women.

The Dyson Corrale Hair Straightener promises to style your hair however you’d like — with half the heat and damage of a traditional hair straightener. Its cord-free design, compact charging dock and 30-minute runtime let you conveniently straighten or curl your hair at home or while you’re traveling. Plus, it comes with a carrying case to keep everything in one spot.

Check out the New York Post Shopping section for more content.