Fortunately, The XM4s are vented to help avoid this problem. Foam creates a better seal for improved noise isolation (and further enhances the ANC, which we’ll talk about in detail later), but can lead to more of the “clogged ear” feeling that’s an issue with this type of tip. Sony ships the XM4s with three sets of foam tips, which is a notable difference from other manufacturers, which mostly stick with silicone. Despite sticking out of my ears more than I like, they never fell out. Still, they’re surprisingly light and shockingly comfortable. The buds themselves are big’uns, especially compared to other modern earbuds like the Jabra Elite 85t. When you take the XM4s out of the box for the first time, one thing is apparent: these are some chonky bois. The Other Stuff: App, Smart Features, and All That Jazzĭesign and Fit: Bigger and Bulkier Than Others, But Plenty Comfortable Justin Duino.Sound Quality, ANC, and Ambient Sound: Deer God.Design and Fit: Bigger and Bulkier Than Others, But Plenty Comfortable.For this review, I’m going to refer to the current-generation earbuds solely as the XM4 despite the over-ear headphones also carrying the XM4 name, so be aware that you’re reading about earbuds here. The WF-1000XM4, a name that just rolls off the tongue in the most elegant way, is the successor to the wildly popular and equally eloquent WF-1000XM3.