Not just pretty faces, these two. Photography courtesy of Colin and Justin.I have only to hear the word "ragweed" for my eyes to get so itchy I'm ready to claw them out. Fortunately, outside of that mercifully short window of seasonal allergies, I'm breathing easy. Others--many others, according to a recent survey by Claritin--aren't quite so lucky. In fact, the holidays present another allergy season to those sensitive to dust, mold and other airborne irritants. The key, of course, is to put the kibosh on these Christmas allergens before they ruin the festive fun. And who better to show us how than those beacons of style, Colin and Justin? Here are the glam Glaswegans top tips for healthy holiday decor: 1. Bag an allergy-friendly tree. Apparently, pine pollen is a mayjah allergy trigger. (In fact, one of the Claritin survey's findings was that 25% of allergy sufferers dispense with a Christmas tree altogether for this very reason.) Fir and spruce are better choices for allergy-sufferers, say the boys, with the Leyland Cypress--a sterile hybrid--a fantastic option, as it doesn't produce pollen—period. 2. Shake it up. Before bringing your fresh-cut tree home, Colin and Justin recommend having the tree farm give it a once-over with a mechanical shaker. This will remove dead needles as well as some of the dust and mold. 3. Go low on PVC. If you're on the market for an artificial tree, choose a polyethylene model with less PVC content. According to Colin and Justin, this cuts down on gasses and is kinder to your home--and the environment. Alternatively, check out this absolutely stunning tree, made from 100% recycled cardboard! 4. Banish fragranced candles. These can cause stuffy noses and irritated lungs. "If you crave a little atmosphere, try unscented beeswax candles," says Colin. 5. Get help from HEPA. Giving those perennial holiday decorations a once-over with the vacuum (preferably one with a HEPA filter) can remove the dust and dirt that's built up over the past year in storage. Follow me on Twitter!